Malicious PDF — malware analysis report

Static analysis result for SHA-256 a252272e33b54e41…

MALICIOUS

PDF

81.4 KB Created: 2021-03-20 04:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5acc9cf129a6e469787f3e35fbae802 SHA-1: ecd93033045c7069373e56fc3fbd5881c89606db SHA-256: a252272e33b54e41f429882489ad34ab57618d895d4ddfbdf4b54b848db14e7c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily corrupted, suggests a lure related to academic material, likely to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=biology+1+pre-ap+semester+review
    • http://websporizle3.com/2647459772541s03.pdf
    • http://obzorov.site/how_to_get_dish_tailgater_to_workjqbmf.pdf
    • https://cdn-cms.f-static.net/uploads/4489596/normal_60545fd691780.pdf
    • http://educationonline.website/como_ocurre_la_metamorfosis_de_una_mariposa6ivfn.pdf
    • http://avtoshkola-region26.ru/37161042100rrk51.pdf
    • http://d-youtube.com/how_to_telnet_using_udp_portr9a6a.pdf
    • http://wodekenizowa.getenjoyment.net/python_learning_books_for_beginners.pdf
    • https://cdn-cms.f-static.net/uploads/4461216/normal_603855d229cbe.pdf
    • http://forisawidokomor.sportsontheweb.net/zidunakidekutoligiwek.pdf
    • http://storedubai.shop/html_maintenance_page_template_freemgz7r.pdf
    • http://sallehub.xyz/will_hbo_max_be_on_fire_tv8w91d.pdf
    • http://itwow.info/fegidalax6e16.pdf
    • https://cdn-cms.f-static.net/uploads/4374537/normal_604f1b1fce427.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bevelidokubisop.rf.gd/kuzozedavapetoj.pdf
    • http://dijilupejiba.rf.gd/air_lap1142n_a_k9_reset_to_default.pdf
    • https://s3.amazonaws.com/kifutizijebuj/fbise_date_sheet_ssc_2018_supplementary.pdf
    • http://gogaretafibofo.rf.gd/22244417403.pdf
    • http://puxetixunelotaz.epizy.com/activesheet_exportasfixedformat_invalid_procedure_call.pdf
    • http://vovajixavago.epizy.com/13922406442.pdf
    • https://s3.amazonaws.com/mutirexa/pijel.pdf
    • https://s3.amazonaws.com/vufuzewasi/rivuvapiwukuzoras.pdf
    • http://begujewirefe.myartsonline.com/karya_ilmiah_bahaya_narkoba_bagi_generasi_muda.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6e.bin
fbe1f404233932df1c5e64656bbe9510901a4f16ac1d92d139a8d1ea0ff7bc7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 5528 bytes
font_01_sfnt_off0000fd51.bin
c157054c939549f28b7b47d5009eeb1baa5afa1ba27c3dac68003ebae801305e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 11064 bytes
font_02_sfnt_off00012356.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12356 16092 bytes

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